Home / 2,987.62-4,481.58-1,138.87

Finding the Fourth Proportional to 2,987.62, 4,481.58 and 1,138.87

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Solution

The fourth proportional to 2,987.62, 4,481.58 and 1,138.87 is: 1,708.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.62 : 4,481.58 = 1,138.87 : x
  2. Step 2: Convert to fraction form
    2,987.62/4,481.58 = 1,138.87/x
  3. Step 3: Cross multiply
    2,987.62x = 4,481.58 × 1,138.87
  4. Step 4: Simplify right side
    2,987.62x = 5,103,946.89
  5. Step 5: Solve for x
    x = 5,103,946.89/2,987.62
  6. Step 6: Final answer
    x = 1,708.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.